Motion-picture shutter.



I. 1-. HUGHES.

' MOHCN PICTURE SHUTTER,

APPLICATION FILED MY 26. 1915 1,209,584. Patented Dec. 19, 1916.

3C PATENT OFFIQL.

imam.

:ntims: of Litters Patent.- 1%?" ma May 243, 19113. Sarrlxl 1% W0jfi3,

ink; is in ha /811i mtzon ta 7 st sing; w

the dfisired resui j While 1'2 opera uion and the aperaisr, that the shutter 1s not m" m *ihe mechzmlsm of m2 5 3d thE machine, and

' i2. 022mb the shutter drix 2 z hmfiingis he think f; should be. fife; afj'ustment' nnnot :11 an.

v wo k 111 55 v ypcandin; and in Which- Tl.- is f V x mm 01%? a nation pktme mxclw my device apoiied therein). vertica 1, longi'tnd'inai, saw through the structure as 9110" Fig. 3- is a vertical, 1311111 View taken on is 1 I mare p aha mm pmtme arm slide, vc w'nc with a. pm" e .4, shaft in suitable baaia'zgs 1? 0n brad-2st; so the mm; the 111950321! i be a bra J r km pic pan; 'esi, tile 1 shaft 18 the axis ft yn'ojv (:i beyond the Mimi-56$} 11 and imasleeve: 19

keyed or otherwise secured rigidly to the projecting end. of the shai't 18 by a set screw 20 passing through an enlarged circular flange 21 at one end of the sleeve. The sleeve is formed with a spiral groove 22 as shown, and mounted to slide loosely upon the sleeve is a shutter supporting plate23 for the usual shutter 24, said plate 23 being preferably formed integral with a coupling 25, and consisting substantially of an enlargedcircular flange 26 spaced from an enlarged circular flange 27, thus providing a space 28 and a circular surface 29, the space receiving therein the arms of a yoke 30, having knobs 31 operatin over the surface 29, the arms of the yo e terminating in 'a stem 32 mounted to rotate in a head 33 at the forward end of the rack 14. A set screw 34 passes through the flange 27 of the shutter supporting element and extends into the spiral groove 22 in the tubular" sleeve 19 as shown for the purpose of imparting the desired movement to the shutter supporting element as will be more clearly brought out hereinafter.

Now assuming that the shutter driving shaft'lS is in motion and the shutter rotating at the usual high rate of speed when the machine is in operation, it will be clearly seen that if the shutter is not disposed in proper' relation to the mechanism of the machine in order to revent travel ghost, it is only necessary fl:

the shaft 16 ,thus advancing or retreating the rack 14 and in turn through the medium of the yoke, advancing or retreating the shutter supporting element on the tubular sleeve 19. The movement of the shutter supporting element on the sleeve, aside from being a backward or a forward one, as the case may be, is also of a rotary one due to the projection of the screw 34 into the spiral groove otthe tubular sleeve 19 so that the mentioned forward or backward movement of the shutter supporting element will cause the same to-turn upon the tubular sleeve and thus the operation of the shut-- ter can be brought into proper relation with the projecting lens of the machine and the shutter will operate in synchronism with the mechanism, without however impairing the rotary movement of the shutter driving shaft 18 or the tubular sleeve 19, rigid on the shaft 18 by reason of the set screw 20.

This adjustment of the shutter, it will be understood, can also be elfected when the machine is not in operation but it will be clear that the adjustment of the shutter while the machine is in operation insures a much more successful adjustment of the shutter with respect to the mechanism of the machine in that the operator, actuating the shaft 16- and at the same time carefully noting the exhibition on the screen, can readily discern'where the trouble hes and r the operator to turnter in proper operating relation to the motion picture apparatus.

The invention described is simple in its construction; consists of few parts that can be readily assembled and will not easily get out of order, and, as mentioned heretofore, the invention can be constructed as an attachment for a previously completed ma chine or, if desirable, built with the machine to form a unitary part thereof.

It will be understood that I do not limit myself to the particular disclosure in the views or the particular description of the device; that various slight changes may be made Without departing from the spirit of the invention, the scope of which is defined in the appended claims.

Having described my invention I claim;

1. A motion picture shutter and operating device for motion picture machines, including a shutter drivingshaft, and a sleeve, said sleeve having a spiral groove,a shuttercarrying element extending into the spiral groove,

a movable rack, means for operatingsaid rack and a yoke pivoted upon said rack and con nected with the shutter supporting element to actuate the same forwardly or backwardly upon the sleeve and simultaneously rotate the element, when the rack is actuated.

the spiral groove to insure an independent rotation of the element when the rack is actuated.

3. In combination with a motion picture apparatus including a driving shaft, a s irally grooved sleeve mounted to rotate Wit 1 said shaft, a shutter carrying clement mounted loosely on the sleeve, a projection on the element and extending into the spiral groove,-a pivoted yoke connecting with the elementto move the same forwardly or hackwardly when the yoke is moved, independently of the rotation of the sleeve by the action of the shaft and means connecting with the yoke to operate the same.

a. A motion picture shutter and operating device for a motion picture machine including a shutter driving shaft, comprising a bracket on the machine and having the shaft jnurnaled therein, a suppleme' tary bracket rigid I with the first mentoned xpowpsa bracket, a siee e on the driving shaft and aotatabie therewith, said sleeve havinga spimi emote, a shutter QZJ'XLYiHgX-Biflififit mounted on said sleeve :1 prometiop. on the element and extending into the groove device fog a motion picture machine, 511-- eludmp: a shutter driving shaft, comprising :1 bracket on we me -lime witn end of the shaft pro eetmg from an end of the bracket,

:1 s31 ipiementm' .umeket secured to tige first demon! bracket, a spirally grooved sleeve on the forward projecting end of the shaft, a shutter carrying element ioosely mounted on said sleeve, :1 projection on the element and extendin into the spir'al groove of the sleeve, a -,shaped yoke in loose Contact with said element, a rack mounted to slide on the suppiementary bracket and having-the yoke bivoted thereto; and a pinion journaled on the supplementary bracket oo-aet-in with the rack to actuate the same when sai pinion is actuated.

In testimony who 'eof I affix my signature 30 in presence oi a witnesi.

JOHN J. HUGHES: fitness AMI BI Harm. 

